From patchwork Tue Sep 19 08:34:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 725175 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BE4C6CD54A8 for ; Tue, 19 Sep 2023 08:34:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231172AbjISIer (ORCPT ); Tue, 19 Sep 2023 04:34:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231577AbjISIee (ORCPT ); Tue, 19 Sep 2023 04:34:34 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0AAA711A; Tue, 19 Sep 2023 01:34:28 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9C7EEC433C8; Tue, 19 Sep 2023 08:34:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695112467; bh=Gd2j5BZkeceRCAPRB3Ed88hy2OH7X0D2yLIWo8KBQt4=; h=From:To:Cc:Subject:Date:From; b=uqPF0RdFSUuPHVS9uiiuFZK/NONs5bMVKha5RE3q0SLUU0w+qAvrDIqMjUqQmdzL8 ar/7hr5tE7F5RNzFvjqx6ZOR7L/5gylxJ0cfFf3Q6G80TxwfRUtxdK4l3EINQ46+Qx ykMh6tdZLaO+7192I177MDjhLtRLRVHG7TzZwV1G62tRsii/GzaeNhjPSfnobNIGGR nihUFbhJTPDE8cwus1Y+9hAXGbdBngDLPA96rsZCF/OfxyZvWe+8FK1MQUNVNRO0p9 nOxm2ywFG4b8rCaotz49XsGAs+b1EoeOHErYMvbFRAsxLqMJ5pw125LEnRdzIN69am a0hvgybCE0j5g== Received: from johan by xi.lan with local (Exim 4.96) (envelope-from ) id 1qiWBs-0006tO-2x; Tue, 19 Sep 2023 10:34:40 +0200 From: Johan Hovold To: Mark Brown Cc: Michal Simek , linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Johan Hovold , stable@vger.kernel.org, Naga Sureshkumar Relli , Shubhrajyoti Datta Subject: [PATCH RESEND] spi: zynqmp-gqspi: fix clock imbalance on probe failure Date: Tue, 19 Sep 2023 10:34:01 +0200 Message-ID: <20230919083401.26454-1-johan+linaro@kernel.org> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Make sure that the device is not runtime suspended before explicitly disabling the clocks on probe failure and on driver unbind to avoid a clock enable-count imbalance. Fixes: 9e3a000362ae ("spi: zynqmp: Add pm runtime support") Cc: stable@vger.kernel.org # 4.19 Cc: Naga Sureshkumar Relli Cc: Shubhrajyoti Datta Signed-off-by: Johan Hovold --- Hi Mark, This patch ended up sitting in your for-next and for-6.4 branches for a few releases but was never sent on to Linus as I reported here: https://lore.kernel.org/lkml/ZOy0l6sXyYib59ej@finisterre.sirena.org.uk/ Now it appears to have been dropped from linux-next so resending. Johan drivers/spi/spi-zynqmp-gqspi.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c index 94d9a33d9af5..9a46b2478f4e 100644 --- a/drivers/spi/spi-zynqmp-gqspi.c +++ b/drivers/spi/spi-zynqmp-gqspi.c @@ -1340,9 +1340,9 @@ static int zynqmp_qspi_probe(struct platform_device *pdev) return 0; clk_dis_all: - pm_runtime_put_sync(&pdev->dev); - pm_runtime_set_suspended(&pdev->dev); pm_runtime_disable(&pdev->dev); + pm_runtime_put_noidle(&pdev->dev); + pm_runtime_set_suspended(&pdev->dev); clk_disable_unprepare(xqspi->refclk); clk_dis_pclk: clk_disable_unprepare(xqspi->pclk); @@ -1366,11 +1366,15 @@ static void zynqmp_qspi_remove(struct platform_device *pdev) { struct zynqmp_qspi *xqspi = platform_get_drvdata(pdev); + pm_runtime_get_sync(&pdev->dev); + zynqmp_gqspi_write(xqspi, GQSPI_EN_OFST, 0x0); + + pm_runtime_disable(&pdev->dev); + pm_runtime_put_noidle(&pdev->dev); + pm_runtime_set_suspended(&pdev->dev); clk_disable_unprepare(xqspi->refclk); clk_disable_unprepare(xqspi->pclk); - pm_runtime_set_suspended(&pdev->dev); - pm_runtime_disable(&pdev->dev); } MODULE_DEVICE_TABLE(of, zynqmp_qspi_of_match);